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How can six Trojan asteroids reside in Neptune's L4 region without colliding?

Jim Weith, Mission Viejo, California
RELATED TOPICS: SOLAR SYSTEM | ASTEROIDS
Asteroid-homes
The gravity of a planet, its star, and the centrifugal force associated with the planetary orbit nearly balance in five regions near the planet’s path where an asteroid (or spacecraft) could orbit safely. These areas are nicknamed L1 through L5 after the French mathematician Joseph Lagrange, the first to catalog all five points.

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